Marble-surfacing machine.



G. H. JORDAN. MARBLE sunmcmo momma.

APPLICATION FILED JUNE-7,1013. 1 081 835 Patented Dec. 16, 1913.

2 8HBETS-BHEET 1.

WIN/E8853 INVENTOR /m r/e s l/. do rda 71,

%17& Wu "Z By TTORNEYS I C. H. JORDAN. MARBLE SURFAGING MACHINE.

APPLICATION FILED JUNE 7, 1913.

1,081,836. Patented Dec.16, 1913.

2 SHEETS-SHEET 2.

INVENTOR I i r/es/fforzian,

ATTORNEYS UNITED STATES PATENT OFFICE.

CHARLES .H. JORDAN, OF NEW YORK, N. Y.

MARBLE-SURFACING MACHINE.

To all whom it may concern:

Be it known that I, CHARLES H. JORDAN, a citizen of the United States, and a resident of the city of New York, Richmond Hill, borough of Queens, in the county of Queens and State of New York, have invented a new and Improved Marble-Surfacing Machine, of which the following is a full, clear, and exact description.

This invention relates to marble surfacing machines, the design and purpose of which is especially for grinding and surfacing slabs ofmarble down to a true surface and even thickness.

With the above purpose in view, the invention consists of a frame. or base 'whichserves as a support for a reciprocating table or bed plate designed to carry the marble, in connection with means for reciprocating the table or bed plate, while associated with the frame or base is an upright or vertical bearing which has an overhanging horizontal arm extending at right angles to the length of the base and which slidably supports a tool-carrying head whereby the tool may be shifted transversel of the marble during the reciprocation of tlie latter so that the full area of a large slab of marble may be 0perated upon.

In connection with the above, a further object of the invention resides in the'provision of a novel form of table or bed plate which is fluted transversely by the provision of ribs fforming intervening notches designed to permit convenient placing and removal of the. marble slabs, there also being provided means to prevent displacement of the slabs and for clamping the same in position, while the frame at the front portion thereof carries a sustainingbar of such cushioning material as wood, whereby the marble slabs can be conveniently handled in placing and removing the same upon or from the bed plate.

A further object of the invention resides in the provision of a .novel form of grinding block consisting of sections of carborundum and associated with a vertically movable or adjustable spindle carried by the sliding head of the machine, and constructed to permit the supply of a blast of water to remove the ground particles of marble from beneath the grinding or polishing disk to prevent the same from interfering with the proper polishing or surfacing of the marble;

lVith the above and other objects in view,

Specification of Letters Patent.

Application filed June 7, 1913.

Patented Dec. 16, 1913.

Serial in.- 772,288.

sectional view taken on the line 22 of Fig.

1; Fig. 3 is a plan view, partly in section, to show the drive means for reciprocating the table or bed plate and the belt shifter employed therewith; Fig. 4 is an enlarged ver tical sectional view of one of the grinding disks; Fig. 5 is a bottom view thereof; Fig.

-6 isa plan view of one of the clamps employed at the ends of the slabs for holding the 'latteron the bed plate; Fig. 7 is a sectional view on the line 7- 7 of Fig. 6; Fig. 8

is a sectional view on the line 8-8 of Fig. 9, of a clamp employed for engaging the front longitudinal edge of the slab; andFi 9 is a side elevation of the last-mentioned 0 amp.

In the illustrated embodiment of the invention, the numeral 10 designates the frame or base of the machine, supported at a spaced distance from the ground or floor .surface by means of corner legs 11 and embodying a substantially rectangular open frame, the longitudinal portions of which are beveled at their upper edges to provide tracks 12 cooperating with groovedprojections 13 of a table or bed plate 14 -to slidably support the latter for reciprocation thereon. The bed plate projects forwardly and rearwardly of the frame and is provided with a fluted upper surface produced by transverse ribs 15 so as to provide intervening notches 16. The ribs are for supporting a slab of ,marble or the like, such as is indicated by the numeral 17, and in order to prevent dlS placement-of the slab rearwardly with rela tion to the tableor bed plate, certain of the ribs are provided with vertical projections 18 at their rear ends forming shoulders against which the rear longitudinaledgeof the slab abuts, the spaces between the ribs permitting the insertion of the hands or a bar for raising the slab in removing the same.

side of the frame or base and comprising a plurality of angular brackets 19 bolted to the frame and having vertical portions 20 formed with recesses communicating withtheir upper edges for receiving a longitudinal sustaining bar 21, preferably of wood and provided with a convexed edge, as illustrated. This sustaining member or bar is level with the upper faces of the ribs 15 and is designed to receive the slab thereon in lacing the latter on the bed plate from the ront'side. When a slab is 1n position on the bed plate and engaged with the vertical or elevated projections 18, it may be held in position by removable clamps 22 and 23 disposed alon the ends and forward longitudinal edge oi the slab. 7

From Fig. 3 of the drawings it will be ob-- served that the ribs 15 are provided with a plurality of equi-distantly spaced sockets 24, said'sockets being designed for engagement by pins 25 depending from the extremities and one edge of a rectangular frame constituting each clamp 23. These clamps are further provided with depending central portions 26 designed to fit snugly between the respective airs of ribsto prevent displacement of t e clamps longitudinally of the bed plate, while the ins 25 prevent lateral displacement of t e clamps. A

clamping screw 27 is loosely engageable through apertures in the spaced portions of each clamp and is adjustable by means of a nut 28, while the screw is provided with a 1 relatively flat and elongated head 29 to engage the edge of the marble or slab below the upper face of the latter, whereby the grindm implements will not contact there with. ach clamp 22 also embodies an open rectangular frame designed to fit between the pairs of ribs and provided with a simi-' larly adjustable engaging screw.

Secured to the back part of the frame and extending above the same is an upright or vertical bearing 30, the same being also designed to be supported or to rest on the ground or floor surface, and terminating at Its upper end inva horizontal or overhanging arm 31 which is of channel-like form but which at spaced intervals is provided with reinforcing ribs 32. This arm tapers toward its free end, as is more clearly shown in Fig. 3 of the drawings, thus reducing its weight, and its rectilinear side is provided with horizontal rojectin portions 33 terminating in upwardiy and ownwardly extending track rails 34 for slidably supporting a head 35. This head isin the form of an open frame provided at its top and bottom ortions with overhanging flanges 36 slida ly engaged with the rails 34, which latter project considerably in rear of the upright or vertical bearing 30, as shown in Figs. 2 and 3 of the drawings, so that a rotating disk or cutter which is carried by the head in a manner to be hereinafter described, may be shifted beyond the area of the slab which is to be surfaced to permit the slab to be placed in position or removed without interference by the disk;

The sliding head 35 is provided with spaced outwardly projecting and'horizontally alined bearing portions 37 which rotatably carry a horizontal shaft 38 to which a pulley or other drive member 39 is fixed for receiving power from a suitable source for rotating the shaft 38. The forward extremity of the sliding head is provided with spaced vertical bearings 39 in which a vertical spindle 40 is rotatably journaled. This spindle is provided with a spline 41 which serves as means for fixing abeveled pinion 42 to the spindle against rotation but to permit vertical displacement of the spindle independently of the pinion which is supported on the lower bearing 39, said pinion being disposed in mesh with a beveled ear or pinion 43 carried by the adjacent en of the shaft 38 and driven thereby. In order to hold the spindle against downward displacement a sleeve 44 is adjustable thereon by set screws 44 to engage the up er bearing 39, and said sleeve is provided with a peripheral groove 45 in which a two-part clamp 46 is secured against vertical displacement, said sleeve at diametrically opposite points, at right angles to the direction of disposition of the clamped ends of the sectiOIlS. being provided with trunni ns 47 which serve as pivots for the spacedportions of a yoke lever 48 fulcrumed as shown at 49 to the sliding head. By this means the free end of the lever which projects beyond the forward extremity of the head may be raised and lowered to shift the spindle 40 vertically without throwing the gears out of mesh and thus move the cutting member 50 carried by the lower end of the spindle into and out of'opei'ative engagement with the surface of the slab.

The head is capable of being moved or shifted longitudinally with respect to the arm 31 byvre'ason of the engagement of an adjusting screw 51 with the head, said adjusting screw being anchored against movement in the end plates of the arm 31 and being capable of rotation by means of a crank wheel 52., thus providing means for shifting the cutter transversely'of the slab. In order .to. reciprocate the table or bed plate and the slab carried thereby, the bed plate on its under side is provided with a central longitudinal rack 53 with which a gear wheel 54 of a train of gearing 55 carried by shafts 56 journaled beneath the frame, meshes, said gears being drivenfrom a shaft 57 trans- 'being understood that one of the belts may be crossed for that purpose. In order to shift the belts independently upon the pulley 59 when imparting reverse rotation to the shaft 57 and the-gears to reciprocate the bed plate, a rod 64 is slidably mounted horizontally through the frame 10 and carries at its-inner end a loop 65"through which the. belt 63'operates, while a rod 66'is also slidably mounted in the frameand carries a loop 67 at its inner end'thr'ough which the belt 62 operates. These rods are provided with rasping portions 68' at their outer ends for s ifting them longitudinally to slide either of the pulleys 62 or 63 upon the pulley 59, and in order to prevent one of the belts from being shifted on to the other an arm 69 is fixed to the rod 6a and slidably engages. the rod 66, while an arm 70 is fixed to the rod Y66 andslidably engages the'rod 64 in rear of the arm 69. Thus, should the rod 64 be shifted to move the belt63 on to the pulley 59, the arm 69' will be shifted in contactwith the arm 70, and although the belt 63 may be re-shifted on the pulley 61', it is obvious that shouldan' attempt be made to shift the belt 62 on to'the pulley 59, the arm 70, will, by its engagement with the arm 69, also shift the rod 64 as the rod 66 is shifted and thereby shift the belt 63 from the pulley 59 to the pulley 51 and vice versa. Since the reciprocation of the bed plate and slab is very slow, it is obvious that the manually operable means provided for reversing the direction of movement of the bed plate will fully suflice and may be conveniently operated together with the crank wheel 52 which serves for the purpose of adjusting the sliding head 35 and grinding disk carried thereby transversely of the slab, whereby the total area or portion of the area of the slab may be operated upon.

The form of grinding member-provided is clearly shown in Figs. l and 5 of the drawings, and the spindle 40 is provided with a longitudinal bore 71 through which water maybe supplied in the usual way. The lower end of'the spindle is provided with a flange 72 and an exteriorlyland in-l ,7 teriorly threaded reduced portion 73 adapted for; engagement by an cxteriorly or interiorly threaded member'of the grinding member. In the present instance a cylindrical block 74 of metal is provided with an interiorly threaded portion by which it is attached to thereduced portion 73 to pro-- vide weighted means whereby the spindle will be normally held downwardly, and also constituting pressure exertin means for increasing the grinding or sur acing action of the tool, which in the present instance is in the form of a plurality, preferably a pair of carborundum sections 75. The block-74 is provided with a surrounding depending flange 76 near its peripheral surface and interiorly is provided with a air of diametrically opposite depending pins 77 which fit between the extremities of the substantially semi-circular carborundum sections and prevent rotation of the latter. The carborundum sections (as illustrated, are substantiall trapezoidal incross section, their outer edges 'being vertical .and their; inner edges tapering downwardly to provide a tapered inner bore adapted for engagement by the tapered head of a screw 78-which is secured in an interiorly threaded bore communicating with the bottom-portion of the block, and which,vby,reason of its tapered, format-ion causes a binding engagement of the outeredges 01' faces of the carborundum blocks or sections with the surrounding inner face of the flange 76, thus securelylholding the blocks in position. As illustrated,v the depending portion 73 is sinteriorly threaded for the attachment of a grinding member having an exteriorly threaded shank without using the block 74:, but the block is provided with a continuous bore which alines with. the bore 79 of the securing screw, thus providing a continuous passage This is permitted with greaterrconvenience than is possible with surfacing machines as now constructed and which employ spaced bearing arms, owing to the fact that the sliding head 35 and the grinding carried thereby may be shifted rearwardly of the table.

Also, by this construction the size of the slabis not limited to the length of the spacebetween the arms as in the machines above referred to, and when the slab is secured in position by the clamping means described,

the belts are shifted alternately to reciprocate the bed late and slab carried thereby. Rotation is a so simultaneously imparted to the vertical spindle for rotating the grinding or polishing disk, which by reason of the sliding head 35 may be arranged at any point transversely of the slab during the reciprocation of the latter, and by reason of the provision of the lever 48, the spindle, together with the grinding member, may be elevated or lowered for moving the same the bed plate from the front of the machine.

into and out of operative engagement with a the slab, or sovas to rotate at an even dis adjust the head transversely of' the bed plate, a grindin memberhavinga vertically adjustable spin le rotatably carried by the head. means for raising and lowering" the grinding member into and out of engagement with the work mounted upon the bed plate, and means forholding the grinding member against downward displacement beyond a predetermined adjusted position.

2. Asurfaci'ng machine of the character described, comprising the combination with a base frame suitably supported and having longitudinal tracks; of a bed plate having groovedportions slidably engaged with the tracks, means for shifting the .bed plate longitudinally, means for reversing the directionof movement of the bed plate,an upright carried in rear of the frame and having an arm overhanging the bed plate horizontally to provide a space beneath the latter and the free end of the arm, guideways formed by the arm, a head slidably engaged with the guideways, means carried by the arm for engagingthe head to shift the latter horizontally with respect to the arm and transversely with respect to the bed plate, a

shaft journaled in the head, a spindle jour-i naled vertically in the head and geared to the shaft for'rotating the spindle. and a grinding member removably carried by the lower end of the spindle.

3. A surfacing machine of the character described, comprising the combination with 5 a base frame suitably supported and having longitudinal tracks; of a bed plate having grooved portions slidably engaged with the .tracks, means for shiftingthe bed plate longitudinally, means for, reversing the direction of movement of the bed plate, an upright arranged in rear of the frame and having an arm horizontally overhanging the bed plate with an unobstructed space between the-free end of the arm and the bed plate, guideways formed by the arm, a

vhead slidably engaged with the guideways,

means carried by the arm for engaging the head to shift the latter longitudinally wit-h respect to the arm and transversely with respect to the bed plate, said head being designed to move rearwardly of the bed plate, a shaft journaled in the head, a spindle journaled vertically in the head and geared to the shaft for rotating the spindle, said spindle being adapted for vertical movement in its bearings, a lever pivoted to the-head, a sleeve adjustable on the spindle and having the lever ivoted thereto intermediate its ends, where y the spindle may be raised or lowered with the lever, said sleeve serving to limit the downward movement of the spindle by contact with the head, and a weighted grinding disk carried by the lower end of the spindle to be moved into and out of engagement with the work mounted on the bed plate. I a

f. The combination -with a supporting frame and a support-"arranged above the same; of a grinding tool rotatably and slidably carried by the support, a bed plate slidably mounted 'onthe frame, means carried by the framefor reciprocating the bed plate, brackets secured to the frame and projecting outwardly thereof beyond the bedplate, a cushioning rail carried by the brackets longitudinally of the frame and located fiush'with the top of the bed plate, said bed plate being fluted and having vertical projections at its rear-edge to retain a slab thereon,=and clamps removably engageable' with the bed plate\to clamp a slab thereon.

5. In a surfacing machine of the character described, the' combination with; a frame and a tool arranged to voperate above the same;v

of-a bed plate carried by the frame, said bed plate having transverse ribs providing intervening notches, projections extending up-. wardly from certain of'the ribs at one edge of the plate for engagement by a marble slab, said ribs also having spaced sockets,

clamps having-engaging screws for contacting the ends of the slab, said clamps being designed toQfit'in the notches betweenv the ribs, and additional clamps also havinge'ngaging screws to contact with the forward lon itudinal edge of the-slab and provided wit spaced pins designed to removably eng ige certain of the sockets formed in the r1 s.

. 6. A marble surfacing machine, comprismg a base, a table slidably supported thereon, drive means for reciprocating the table, an upright positioned centrally of one longi- V tudinal side of'the base and terminating at its upper end in a horizontal arm overhanging the table and tapered toward its free end, said arm having upwardly. extending and depending flanges projecting rearwardly of the table, a head having. spaced grooves slidably engaging the flanges and provided with a pair of spaced horizontal bearings and a pair of'spaced'vertical bearings at its forwardend, a shaft-rotatable in the firstnamed bearings, a gear wheel on the forward end of the shaft, a drive member on the shaft between the bearings for rotating the shaft from a suitablesource of drive power, a spindle journaled in the secondnamed bearings, a gear wheel splined on the spindle and in mesh with the first-named gear, said second-named gear being supported upon the lower bearings, a sleeve loosely fitted on the spindle above the upper bearings and held against downward displacement, said sleeve having diametrically opposed pivots, a lever pivoted to the head and having a yoke mounted on said pivots for raising and lowering the spindle therewith, and a grinding disk carried by the lower end of the spindle.

7. A marble surfacing machine, comprising a base, a table slidably supported thereon, drive means for reciprocating the table, an upright positioned at one side of the base and terminating at its upper end in a horizontal arm overhanging the table, said arm having guide flanges projecting rearwardly of the table, a head having spaced grooves slidably engaging the flanges and provided with horizontal bearings and a pair of spaced vertical bearings, a shaft rotatable in a the first-named bearings, a gear wheel on the shaft, a drive member for rotating the shaft,

a spindle journaled in the second-named bearings, a gear wheel splined on the spindle and in mesh with the first-named gear, said second named gear being supported upon the lower bearing against downward displacement and maintained in mesh with the first-named gear, a sleeve loosely fitted on the spindle above the upper bearing and held against longitudinal displacement on the spindle, a lever pivoted to the head for raising and lowering the spindle, means for sliding the head longitudinally of the arm, and a tool carried by said spindle.

8. The combination with a frame having spaced longitudinal rails and a bed plate having grooves slidably engaging the rails, a tool carrying head arranged above the bed plate, a single overhanging arm slidably supporting the head, means for reciprocat- 7 ing the bed plate, said means embodying cooperative drive parts carried by the bed plate and frame respectively, a drive shaft supported by the frame and projecting beyond the latter, said shaft being operatively connected to the drive parts carried by the frame, a bearing supporting the projecting end of the shaft, a pair of loose ulleys and a tight pulley carried by the shaft, belts engaged on the loose pulleys, shifting rods slidable horizontally through the frame and having loops at their inner ends respectively receiving one lap of a belt therethrough, and an arm fixed to each rod and slidably engaged with the other rod, said arms being designed to contact to prevent simultaneous engagement of the belts on the tight pulley when one belt is engaged thereon and the other belt is shifted.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES H. JORDAN.

Witnesses:

J. EDWIN BURCH, PHILIP D. ROLLHAUS. 

